<template>
  <!-- 父传子方法5.为弹层绑定上:visible="visible" -->
  <!-- 子传父6.  @close="$emit('update:visible',false)" 绑定弹层子传父属性回去 -->
  <el-dialog
    width="500px"
    title="员工导入"
    :visible="visible"
    @close="$emit('update:visible',false)"
  >
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <input
          ref="excel-upload-input"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="onChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="onTemplate">下载导入模板</el-button>
          <span>将文件拖到此处或
            <el-button type="text" @click="onUploading">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>
    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button
        size="mini"
        type="primary"
        @click="$emit('update:visible',false)"
      >取消</el-button>
    </el-row>
  </el-dialog>
</template>
<script>
import { getEmployeeTemplateAPI, postEmployeeAPI } from '@/api/employee'
import fileSaver from 'file-saver'

export default {
  props: {
    // 父传子方法4.接受父组件传的visible属性
    visible: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    // 导出员工模板按钮
    async onTemplate() {
      // 发请求调用导出员工模板API
      const res = await getEmployeeTemplateAPI()
      // 固定写法后面是文件名字
      fileSaver.saveAs(res, '员工模板.xlsx')
    },
    // 点击上传按钮
    onUploading() {
      this.$refs['excel-upload-input'].click()
    },
    // 监听隐藏起来真正的点击上传按钮
    async   onChange(e) {
      const files = e.target.files
      if (files.length) {
        const file = files[0]
        const data = new FormData()
        data.append('file', file)
        try {
          await postEmployeeAPI(data)
          this.$parent.getEmployeeList()
          this.$emit('update:visible', false)
          this.$message.success('上传成功')
        } catch (error) {
          // 上传失败
        } finally {
          // 无论成功失败都会清楚掉上次上传的条件
          this.$refs['excel-upload-input'].value = ''
        }
      }
    }
  }
}
</script>

<style scoped lang="scss">
.upload-excel {
  display: flex;
  justify-content: center;
  margin: 20px;
  width: 360px;
  height: 180px;
  align-items: center;
  color: #697086;
  .excel-upload-input {
    display: none;
    z-index: -9999;
  }
  .btn-upload,
  .drop {
    border: 1px dashed #dcdfe6;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 160px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .drop {
    line-height: 40px;
    color: #bbb;
    i {
      font-size: 60px;
      display: block;
      color: #c0c4cc;
    }
  }
}
</style>

